Bobcat Dancing Alone on Sky Road, No Altitude Sickness
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Stretching endlessly, the 318 Sichuan-Tibet National Highway is a vital traffic artery across the Qinghai-Tibet Plateau, featuring complex terrain and extremely difficult road maintenance. At the Sejila Pass over 4,700 meters above sea level, snow prevails all year round, and the oxygen content is less than 60% of that in plain areas. When the snow melts and frozen soil thaws in turn, the road surface is prone to cracks, potholes and subsidence, bringing hidden dangers to road traffic and making plateau road maintenance an arduous task.
Against such harsh high-altitude conditions, the Bobcat S650 skid-steer loader staged a remarkable one-machine maintenance performance at the construction site of 4,500 meters above sea level. It independently completed the whole process of pavement milling, cleaning and paving, subverting the traditional maintenance mode that once required multiple devices and workers. Veteran maintenance workers praised it sincerely: "In the past, road maintenance needed several sets of equipment working in turn, but now this single machine can finish all the work independently with greatly improved efficiency."
As the foundational procedure of road maintenance, milling determines the quality of pavement repair. Equipped with a 24-inch self-leveling milling attachment, the Bobcat S650 operates stably with sufficient power. Its high-speed rotating milling drum peels off the damaged asphalt layer accurately and evenly. The hydraulic side-shift function enables close operation along road edges without dead ends, leaving a flat and uniform pavement base. Most construction machinery suffers from sharp power reduction, black smoke or even flameout due to thin air at high altitudes. However, the S650’s China-IV emission engine reserves abundant torque, maintaining stable and non-decaying power in plateau environments, winning high recognition from on-site technical personnel.
Immediately after milling, the operator quickly replaces the attachment with a 72-inch enclosed sweeper for continuous operation. Driven by a hydraulic motor, the combined brush blades rotate at high speed, completely collecting asphalt debris and dust. The enclosed design effectively suppresses dust caused by strong plateau winds, protecting the local ecological environment and improving construction quality. The whole process of material collection, transfer and dumping is completed smoothly in one go. Maintenance officials pointed out that the integrated operation eliminates the waiting and coordination problems between separate milling and sweeping equipment, saving working hours and omitting water dust reduction procedures.
The Bobcat S650 shows unique advantages in asphalt paving. Large pavers are too bulky to turn and operate flexibly on the narrow and winding mountain roads of the 318 Highway. In contrast, the compact S650 features in-situ steering and flexible mobility, adapting perfectly to narrow construction spaces. Fitted with an asphalt paving attachment, it spreads hot asphalt mixture evenly and flattens the pavement stably with accurate thickness control and smooth joints, delivering high-standard paving results that satisfy all on-site workers.
The S650 operates continuously for hours in the maintenance section from Sejila Mountain to Gongbujiangda at an altitude of over 4,500 meters. The water temperature and oil temperature remain stable without any fault alarms, completely overcoming the "plateau reaction" of construction machinery. It adapts to extreme working conditions including high-altitude hypoxia, low temperature frozen soil, high temperature and strong wind. Meanwhile, the sealed and pressurized cab isolates wind and sand, and the comfortable seat and constant-temperature air conditioning greatly reduce the operator’s working intensity.
With its high efficiency, stability and versatility, the Bobcat S650 has become the preferred equipment for medium and minor maintenance of the 318 Sichuan-Tibet Highway. It delivers integrated milling, sweeping and paving solutions with superior plateau power performance and flexibility. On the long snowy sky road, the Bobcat S650 guards every smooth kilometer of the 318 National Highway with reliable quality and all-round capabilities.